短语词组短语pain palliation 止痛palliation method 缓解方法Palliation Accord 减伤调和bone pain palliation 骨疼痛治疗palliation of a crime 减轻罪行pain palliation efficacy 止痛疗效Endoscopic palliation of esophageal cancer 食管癌内镜姑息治疗 返回 palliation